Flights from London to Seattle Tacoma

Our cheapest offers for flights from London to Seattle Tacoma

Here you can compare cheap flights from London (LON) to Seattle Tacoma (SEA) for one-way or return trips. The following offers were searched for and found on idealo during the last few days. Or start your own flight search to Seattle Tacoma. Prices and availability may change at any time.

Outbound Return Airlines Shop Baggage Price
London
Seattle-Tacoma
Outbound
04/11/25
1 Stopover (KEF)
FI0471, FI0681
13h 05min
Return
03/12/25
1 Stopover (KEF)
FI0680, FI0470
12h 20min
Icelandair
£406
Best option
London
Seattle-Tacoma
Outbound
16/12/25
direct
BA0053
10h 05min
Return
13/01/26
direct
BA0048
09h 30min
British Airways
£537
London
Seattle-Tacoma
Outbound
22/12/25
1 Stopover (FRA)
LH0923, DE2032
16h 10min
Return
10/01/26
1 Stopover (FRA)
DE2033, LH0910
14h 10min
Lufthansa, Condor
£950
London
Seattle-Tacoma
Outbound
19/02/26
1 Stopover (KEF)
FI0471, FI0681
13h 05min
Return
22/02/26
1 Stopover (KEF)
FI0680, FI0470
12h 20min
Icelandair
£409
London
Seattle-Tacoma
Outbound
23/01/26
1 Stopover (KEF)
FI0471, FI0681
13h 05min
Return
31/01/26
1 Stopover (KEF)
FI0680, FI0470
12h 20min
Icelandair
£411
London
Seattle-Tacoma
Outbound
19/02/26
1 Stopover (KEF)
FI0471, FI0681
13h 05min
Return
22/02/26
1 Stopover (KEF)
FI0680, FI0470
12h 20min
Icelandair
£418
London
Seattle-Tacoma
Outbound
19/02/26
1 Stopover (KEF)
FI0471, FI0681
13h 05min
Return
22/02/26
1 Stopover (KEF)
FI0680, FI0470
12h 20min
Icelandair ?
£420
London
Seattle-Tacoma
Outbound
19/02/26
1 Stopover (KEF)
FI0471, FI0681
13h 05min
Return
22/02/26
1 Stopover (KEF)
FI0680, FI0470
12h 20min
Icelandair
£439
London
Seattle-Tacoma
Outbound
19/02/26
1 Stopover (KEF)
FI0451, FI0681
12h 45min
Return
22/02/26
1 Stopover (KEF)
FI0680, FI0454
20h 55min
Icelandair
£444
London
Seattle-Tacoma
Outbound
04/11/25
2 Stopovers (MCO, PHX)
AA7012, AA2284, AA2073
58h 48min
Return
03/12/25
2 Stopovers (MIA, TPA)
AA2142, AA3316, AA7014
26h 52min
American Airlines ?
£453
Prices based on recent searches, subject to last-minute changes
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Tips and tricks to help you find cheap flights from London to Seattle Tacoma

Favourite airline: Icelandair
The most popular airline for flights from London to Seattle-Tacoma is Icelandair.
Icelandair
50 %
Turkish Airlines
18 %
British Airways
10 %
Stopover flights are the cheapest connection
Direct flights on this route are £454.00 more expensive on average than flights with a stopover.
non stop flight
1 stop
2 stops
09h 45min
15h 35min
17h 30min
£ 973
£ 519
£ 1.330
Favourite connection: via Reykjavik-Keflavik
Stopover flights on this route are especially popular via Reykjavik-Keflavik, making up 54 % of bookings.
Route
bookings
1 stopover Reykjavik-Keflavik International
15h 35min, from £ 519
54 %
1 stopover Istanbul
32h 05min, from £ 891
19 %
Direct flights
09h 45min, from £ 973
16 %

Important flight information

Flight information: London - Seattle-Tacoma

Outbound and return from £ 405,99
Flight duration min. 09:50 / max. 09:55
Return flight duration min. 09:20/ max. 09:30
Distance 7721 km
Flights per week 19
Departure airport Airport London (LCY, LGW, LHR, LTN, STN, SEN) (LON)
Arrival airport Airport Seattle-Tacoma (SEA)
Destination country Flights to United States
Alternative routes to United States
Alternative flights to Seattle-Tacoma
Flight destinations with a similar price